1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /****************************************************************************** 3 ******************************************************************************* 4 ** 5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 7 ** 8 ** 9 ******************************************************************************* 10 ******************************************************************************/ 11 12 #ifndef __DLM_INTERNAL_DOT_H__ 13 #define __DLM_INTERNAL_DOT_H__ 14 15 /* 16 * This is the main header file to be included in each DLM source file. 17 */ 18 19 #include <linux/slab.h> 20 #include <linux/sched.h> 21 #include <linux/types.h> 22 #include <linux/ctype.h> 23 #include <linux/spinlock.h> 24 #include <linux/vmalloc.h> 25 #include <linux/list.h> 26 #include <linux/errno.h> 27 #include <linux/random.h> 28 #include <linux/delay.h> 29 #include <linux/socket.h> 30 #include <linux/kthread.h> 31 #include <linux/kobject.h> 32 #include <linux/kref.h> 33 #include <linux/kernel.h> 34 #include <linux/jhash.h> 35 #include <linux/miscdevice.h> 36 #include <linux/mutex.h> 37 #include <linux/idr.h> 38 #include <linux/ratelimit.h> 39 #include <linux/uaccess.h> 40 41 #include <linux/dlm.h> 42 #include "config.h" 43 44 struct dlm_ls; 45 struct dlm_lkb; 46 struct dlm_rsb; 47 struct dlm_member; 48 struct dlm_rsbtable; 49 struct dlm_recover; 50 struct dlm_header; 51 struct dlm_message; 52 struct dlm_rcom; 53 struct dlm_mhandle; 54 struct dlm_msg; 55 56 #define log_print(fmt, args...) \ 57 printk(KERN_ERR "dlm: "fmt"\n" , ##args) 58 #define log_print_ratelimited(fmt, args...) \ 59 printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args) 60 #define log_error(ls, fmt, args...) \ 61 printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) 62 63 #define log_rinfo(ls, fmt, args...) \ 64 do { \ 65 if (dlm_config.ci_log_info) \ 66 printk(KERN_INFO "dlm: %s: " fmt "\n", \ 67 (ls)->ls_name, ##args); \ 68 else if (dlm_config.ci_log_debug) \ 69 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 70 (ls)->ls_name , ##args); \ 71 } while (0) 72 73 #define log_debug(ls, fmt, args...) \ 74 do { \ 75 if (dlm_config.ci_log_debug) \ 76 printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ 77 (ls)->ls_name , ##args); \ 78 } while (0) 79 80 #define log_limit(ls, fmt, args...) \ 81 do { \ 82 if (dlm_config.ci_log_debug) \ 83 printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ 84 (ls)->ls_name , ##args); \ 85 } while (0) 86 87 #define DLM_ASSERT(x, do) \ 88 { \ 89 if (!(x)) \ 90 { \ 91 printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ 92 "DLM: assertion: \"%s\"\n" \ 93 "DLM: time = %lu\n", \ 94 __LINE__, __FILE__, #x, jiffies); \ 95 {do} \ 96 printk("\n"); \ 97 panic("DLM: Record message above and reboot.\n"); \ 98 } \ 99 } 100 101 102 #define DLM_RTF_SHRINK 0x00000001 103 104 struct dlm_rsbtable { 105 struct rb_root keep; 106 struct rb_root toss; 107 spinlock_t lock; 108 uint32_t flags; 109 }; 110 111 112 /* 113 * Lockspace member (per node in a ls) 114 */ 115 116 struct dlm_member { 117 struct list_head list; 118 int nodeid; 119 int weight; 120 int slot; 121 int slot_prev; 122 int comm_seq; 123 uint32_t generation; 124 }; 125 126 /* 127 * Save and manage recovery state for a lockspace. 128 */ 129 130 struct dlm_recover { 131 struct list_head list; 132 struct dlm_config_node *nodes; 133 int nodes_count; 134 uint64_t seq; 135 }; 136 137 /* 138 * Pass input args to second stage locking function. 139 */ 140 141 struct dlm_args { 142 uint32_t flags; 143 void (*astfn) (void *astparam); 144 void *astparam; 145 void (*bastfn) (void *astparam, int mode); 146 int mode; 147 struct dlm_lksb *lksb; 148 #ifdef CONFIG_DLM_DEPRECATED_API 149 unsigned long timeout; 150 #endif 151 }; 152 153 154 /* 155 * Lock block 156 * 157 * A lock can be one of three types: 158 * 159 * local copy lock is mastered locally 160 * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) 161 * process copy lock is mastered on a remote node 162 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) 163 * master copy master node's copy of a lock owned by remote node 164 * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) 165 * 166 * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or 167 * dlm_unlock. The dlm does not modify these or use any private flags in 168 * this field; it only contains DLM_LKF_ flags from dlm.h. These flags 169 * are sent as-is to the remote master when the lock is remote. 170 * 171 * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. 172 * Some internal flags are shared between the master and process nodes; 173 * these shared flags are kept in the lower two bytes. One of these 174 * flags set on the master copy will be propagated to the process copy 175 * and v.v. Other internal flags are private to the master or process 176 * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. 177 * 178 * lkb_sbflags: status block flags. These flags are copied directly into 179 * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion 180 * ast. All defined in dlm.h with DLM_SBF_ prefix. 181 * 182 * lkb_status: the lock status indicates which rsb queue the lock is 183 * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT 184 * 185 * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a 186 * reply is needed. Only set when the lkb is on the lockspace waiters 187 * list awaiting a reply from a remote node. 188 * 189 * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb 190 * is a master copy, nodeid specifies the remote lock holder, when the 191 * lkb is a process copy, the nodeid specifies the lock master. 192 */ 193 194 /* lkb_status */ 195 196 #define DLM_LKSTS_WAITING 1 197 #define DLM_LKSTS_GRANTED 2 198 #define DLM_LKSTS_CONVERT 3 199 200 /* lkb_flags */ 201 202 #define DLM_IFL_MSTCPY 0x00010000 203 #define DLM_IFL_RESEND 0x00020000 204 #define DLM_IFL_DEAD 0x00040000 205 #define DLM_IFL_OVERLAP_UNLOCK 0x00080000 206 #define DLM_IFL_OVERLAP_CANCEL 0x00100000 207 #define DLM_IFL_ENDOFLIFE 0x00200000 208 #ifdef CONFIG_DLM_DEPRECATED_API 209 #define DLM_IFL_WATCH_TIMEWARN 0x00400000 210 #define DLM_IFL_TIMEOUT_CANCEL 0x00800000 211 #endif 212 #define DLM_IFL_DEADLOCK_CANCEL 0x01000000 213 #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ 214 #define DLM_IFL_CB_PENDING 0x04000000 215 /* least significant 2 bytes are message changed, they are full transmitted 216 * but at receive side only the 2 bytes LSB will be set. 217 * 218 * Even wireshark dlm dissector does only evaluate the lower bytes and note 219 * that they may not be used on transceiver side, we assume the higher bytes 220 * are for internal use or reserved so long they are not parsed on receiver 221 * side. 222 */ 223 #define DLM_IFL_USER 0x00000001 224 #define DLM_IFL_ORPHAN 0x00000002 225 226 #define DLM_CB_CAST 0x00000001 227 #define DLM_CB_BAST 0x00000002 228 229 struct dlm_callback { 230 uint32_t flags; /* DLM_CBF_ */ 231 int sb_status; /* copy to lksb status */ 232 uint8_t sb_flags; /* copy to lksb flags */ 233 int8_t mode; /* rq mode of bast, gr mode of cast */ 234 235 struct list_head list; 236 struct kref ref; 237 }; 238 239 struct dlm_lkb { 240 struct dlm_rsb *lkb_resource; /* the rsb */ 241 struct kref lkb_ref; 242 int lkb_nodeid; /* copied from rsb */ 243 int lkb_ownpid; /* pid of lock owner */ 244 uint32_t lkb_id; /* our lock ID */ 245 uint32_t lkb_remid; /* lock ID on remote partner */ 246 uint32_t lkb_exflags; /* external flags from caller */ 247 uint32_t lkb_sbflags; /* lksb flags */ 248 uint32_t lkb_flags; /* internal flags */ 249 uint32_t lkb_lvbseq; /* lvb sequence number */ 250 251 int8_t lkb_status; /* granted, waiting, convert */ 252 int8_t lkb_rqmode; /* requested lock mode */ 253 int8_t lkb_grmode; /* granted lock mode */ 254 int8_t lkb_highbast; /* highest mode bast sent for */ 255 256 int8_t lkb_wait_type; /* type of reply waiting for */ 257 int8_t lkb_wait_count; 258 int lkb_wait_nodeid; /* for debugging */ 259 260 struct list_head lkb_statequeue; /* rsb g/c/w list */ 261 struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ 262 struct list_head lkb_wait_reply; /* waiting for remote reply */ 263 struct list_head lkb_ownqueue; /* list of locks for a process */ 264 ktime_t lkb_timestamp; 265 266 #ifdef CONFIG_DLM_DEPRECATED_API 267 struct list_head lkb_time_list; 268 unsigned long lkb_timeout_cs; 269 #endif 270 271 spinlock_t lkb_cb_lock; 272 struct work_struct lkb_cb_work; 273 struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ 274 struct list_head lkb_callbacks; 275 struct dlm_callback *lkb_last_cast; 276 struct dlm_callback *lkb_last_cb; 277 int lkb_last_bast_mode; 278 ktime_t lkb_last_cast_time; /* for debugging */ 279 ktime_t lkb_last_bast_time; /* for debugging */ 280 281 uint64_t lkb_recover_seq; /* from ls_recover_seq */ 282 283 char *lkb_lvbptr; 284 struct dlm_lksb *lkb_lksb; /* caller's status block */ 285 void (*lkb_astfn) (void *astparam); 286 void (*lkb_bastfn) (void *astparam, int mode); 287 union { 288 void *lkb_astparam; /* caller's ast arg */ 289 struct dlm_user_args *lkb_ua; 290 }; 291 }; 292 293 /* 294 * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real 295 * nodeid, even when nodeid is our_nodeid. 296 * 297 * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, 298 * greater than zero when another nodeid. 299 * 300 * (TODO: remove res_nodeid and only use res_master_nodeid) 301 */ 302 303 struct dlm_rsb { 304 struct dlm_ls *res_ls; /* the lockspace */ 305 struct kref res_ref; 306 struct mutex res_mutex; 307 unsigned long res_flags; 308 int res_length; /* length of rsb name */ 309 int res_nodeid; 310 int res_master_nodeid; 311 int res_dir_nodeid; 312 int res_id; /* for ls_recover_idr */ 313 uint32_t res_lvbseq; 314 uint32_t res_hash; 315 uint32_t res_bucket; /* rsbtbl */ 316 unsigned long res_toss_time; 317 uint32_t res_first_lkid; 318 struct list_head res_lookup; /* lkbs waiting on first */ 319 union { 320 struct list_head res_hashchain; 321 struct rb_node res_hashnode; /* rsbtbl */ 322 }; 323 struct list_head res_grantqueue; 324 struct list_head res_convertqueue; 325 struct list_head res_waitqueue; 326 327 struct list_head res_root_list; /* used for recovery */ 328 struct list_head res_recover_list; /* used for recovery */ 329 int res_recover_locks_count; 330 331 char *res_lvbptr; 332 char res_name[DLM_RESNAME_MAXLEN+1]; 333 }; 334 335 /* dlm_master_lookup() flags */ 336 337 #define DLM_LU_RECOVER_DIR 1 338 #define DLM_LU_RECOVER_MASTER 2 339 340 /* dlm_master_lookup() results */ 341 342 #define DLM_LU_MATCH 1 343 #define DLM_LU_ADD 2 344 345 /* find_rsb() flags */ 346 347 #define R_REQUEST 0x00000001 348 #define R_RECEIVE_REQUEST 0x00000002 349 #define R_RECEIVE_RECOVER 0x00000004 350 351 /* rsb_flags */ 352 353 enum rsb_flags { 354 RSB_MASTER_UNCERTAIN, 355 RSB_VALNOTVALID, 356 RSB_VALNOTVALID_PREV, 357 RSB_NEW_MASTER, 358 RSB_NEW_MASTER2, 359 RSB_RECOVER_CONVERT, 360 RSB_RECOVER_GRANT, 361 RSB_RECOVER_LVB_INVAL, 362 }; 363 364 static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) 365 { 366 __set_bit(flag, &r->res_flags); 367 } 368 369 static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) 370 { 371 __clear_bit(flag, &r->res_flags); 372 } 373 374 static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) 375 { 376 return test_bit(flag, &r->res_flags); 377 } 378 379 380 /* dlm_header is first element of all structs sent between nodes */ 381 382 #define DLM_HEADER_MAJOR 0x00030000 383 #define DLM_HEADER_MINOR 0x00000002 384 385 #define DLM_VERSION_3_1 0x00030001 386 #define DLM_VERSION_3_2 0x00030002 387 388 #define DLM_HEADER_SLOTS 0x00000001 389 390 #define DLM_MSG 1 391 #define DLM_RCOM 2 392 #define DLM_OPTS 3 393 #define DLM_ACK 4 394 #define DLM_FIN 5 395 396 struct dlm_header { 397 __le32 h_version; 398 union { 399 /* for DLM_MSG and DLM_RCOM */ 400 __le32 h_lockspace; 401 /* for DLM_ACK and DLM_OPTS */ 402 __le32 h_seq; 403 } u; 404 __le32 h_nodeid; /* nodeid of sender */ 405 __le16 h_length; 406 uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ 407 uint8_t h_pad; 408 }; 409 410 #define DLM_MSG_REQUEST 1 411 #define DLM_MSG_CONVERT 2 412 #define DLM_MSG_UNLOCK 3 413 #define DLM_MSG_CANCEL 4 414 #define DLM_MSG_REQUEST_REPLY 5 415 #define DLM_MSG_CONVERT_REPLY 6 416 #define DLM_MSG_UNLOCK_REPLY 7 417 #define DLM_MSG_CANCEL_REPLY 8 418 #define DLM_MSG_GRANT 9 419 #define DLM_MSG_BAST 10 420 #define DLM_MSG_LOOKUP 11 421 #define DLM_MSG_REMOVE 12 422 #define DLM_MSG_LOOKUP_REPLY 13 423 #define DLM_MSG_PURGE 14 424 425 struct dlm_message { 426 struct dlm_header m_header; 427 __le32 m_type; /* DLM_MSG_ */ 428 __le32 m_nodeid; 429 __le32 m_pid; 430 __le32 m_lkid; /* lkid on sender */ 431 __le32 m_remid; /* lkid on receiver */ 432 __le32 m_parent_lkid; 433 __le32 m_parent_remid; 434 __le32 m_exflags; 435 __le32 m_sbflags; 436 __le32 m_flags; 437 __le32 m_lvbseq; 438 __le32 m_hash; 439 __le32 m_status; 440 __le32 m_grmode; 441 __le32 m_rqmode; 442 __le32 m_bastmode; 443 __le32 m_asts; 444 __le32 m_result; /* 0 or -EXXX */ 445 char m_extra[]; /* name or lvb */ 446 }; 447 448 449 #define DLM_RS_NODES 0x00000001 450 #define DLM_RS_NODES_ALL 0x00000002 451 #define DLM_RS_DIR 0x00000004 452 #define DLM_RS_DIR_ALL 0x00000008 453 #define DLM_RS_LOCKS 0x00000010 454 #define DLM_RS_LOCKS_ALL 0x00000020 455 #define DLM_RS_DONE 0x00000040 456 #define DLM_RS_DONE_ALL 0x00000080 457 458 #define DLM_RCOM_STATUS 1 459 #define DLM_RCOM_NAMES 2 460 #define DLM_RCOM_LOOKUP 3 461 #define DLM_RCOM_LOCK 4 462 #define DLM_RCOM_STATUS_REPLY 5 463 #define DLM_RCOM_NAMES_REPLY 6 464 #define DLM_RCOM_LOOKUP_REPLY 7 465 #define DLM_RCOM_LOCK_REPLY 8 466 467 struct dlm_rcom { 468 struct dlm_header rc_header; 469 __le32 rc_type; /* DLM_RCOM_ */ 470 __le32 rc_result; /* multi-purpose */ 471 __le64 rc_id; /* match reply with request */ 472 __le64 rc_seq; /* sender's ls_recover_seq */ 473 __le64 rc_seq_reply; /* remote ls_recover_seq */ 474 char rc_buf[]; 475 }; 476 477 struct dlm_opt_header { 478 __le16 t_type; 479 __le16 t_length; 480 __le32 t_pad; 481 /* need to be 8 byte aligned */ 482 char t_value[]; 483 }; 484 485 /* encapsulation header */ 486 struct dlm_opts { 487 struct dlm_header o_header; 488 uint8_t o_nextcmd; 489 uint8_t o_pad; 490 __le16 o_optlen; 491 __le32 o_pad2; 492 char o_opts[]; 493 }; 494 495 union dlm_packet { 496 struct dlm_header header; /* common to other two */ 497 struct dlm_message message; 498 struct dlm_rcom rcom; 499 struct dlm_opts opts; 500 }; 501 502 #define DLM_RSF_NEED_SLOTS 0x00000001 503 504 /* RCOM_STATUS data */ 505 struct rcom_status { 506 __le32 rs_flags; 507 __le32 rs_unused1; 508 __le64 rs_unused2; 509 }; 510 511 /* RCOM_STATUS_REPLY data */ 512 struct rcom_config { 513 __le32 rf_lvblen; 514 __le32 rf_lsflags; 515 516 /* DLM_HEADER_SLOTS adds: */ 517 __le32 rf_flags; 518 __le16 rf_our_slot; 519 __le16 rf_num_slots; 520 __le32 rf_generation; 521 __le32 rf_unused1; 522 __le64 rf_unused2; 523 }; 524 525 struct rcom_slot { 526 __le32 ro_nodeid; 527 __le16 ro_slot; 528 __le16 ro_unused1; 529 __le64 ro_unused2; 530 }; 531 532 struct rcom_lock { 533 __le32 rl_ownpid; 534 __le32 rl_lkid; 535 __le32 rl_remid; 536 __le32 rl_parent_lkid; 537 __le32 rl_parent_remid; 538 __le32 rl_exflags; 539 __le32 rl_flags; 540 __le32 rl_lvbseq; 541 __le32 rl_result; 542 int8_t rl_rqmode; 543 int8_t rl_grmode; 544 int8_t rl_status; 545 int8_t rl_asts; 546 __le16 rl_wait_type; 547 __le16 rl_namelen; 548 char rl_name[DLM_RESNAME_MAXLEN]; 549 char rl_lvb[]; 550 }; 551 552 /* 553 * The max number of resources per rsbtbl bucket that shrink will attempt 554 * to remove in each iteration. 555 */ 556 557 #define DLM_REMOVE_NAMES_MAX 8 558 559 struct dlm_ls { 560 struct list_head ls_list; /* list of lockspaces */ 561 dlm_lockspace_t *ls_local_handle; 562 uint32_t ls_global_id; /* global unique lockspace ID */ 563 uint32_t ls_generation; 564 uint32_t ls_exflags; 565 int ls_lvblen; 566 atomic_t ls_count; /* refcount of processes in 567 the dlm using this ls */ 568 wait_queue_head_t ls_count_wait; 569 int ls_create_count; /* create/release refcount */ 570 unsigned long ls_flags; /* LSFL_ */ 571 unsigned long ls_scan_time; 572 struct kobject ls_kobj; 573 574 struct idr ls_lkbidr; 575 spinlock_t ls_lkbidr_spin; 576 577 struct dlm_rsbtable *ls_rsbtbl; 578 uint32_t ls_rsbtbl_size; 579 580 struct mutex ls_waiters_mutex; 581 struct list_head ls_waiters; /* lkbs needing a reply */ 582 583 struct mutex ls_orphans_mutex; 584 struct list_head ls_orphans; 585 586 #ifdef CONFIG_DLM_DEPRECATED_API 587 struct mutex ls_timeout_mutex; 588 struct list_head ls_timeout; 589 #endif 590 591 spinlock_t ls_new_rsb_spin; 592 int ls_new_rsb_count; 593 struct list_head ls_new_rsb; /* new rsb structs */ 594 595 char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; 596 int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; 597 598 struct list_head ls_nodes; /* current nodes in ls */ 599 struct list_head ls_nodes_gone; /* dead node list, recovery */ 600 int ls_num_nodes; /* number of nodes in ls */ 601 int ls_low_nodeid; 602 int ls_total_weight; 603 int *ls_node_array; 604 605 int ls_slot; 606 int ls_num_slots; 607 int ls_slots_size; 608 struct dlm_slot *ls_slots; 609 610 struct dlm_rsb ls_stub_rsb; /* for returning errors */ 611 struct dlm_lkb ls_stub_lkb; /* for returning errors */ 612 struct dlm_message ls_stub_ms; /* for faking a reply */ 613 614 struct dentry *ls_debug_rsb_dentry; /* debugfs */ 615 struct dentry *ls_debug_waiters_dentry; /* debugfs */ 616 struct dentry *ls_debug_locks_dentry; /* debugfs */ 617 struct dentry *ls_debug_all_dentry; /* debugfs */ 618 struct dentry *ls_debug_toss_dentry; /* debugfs */ 619 620 wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ 621 int ls_uevent_result; 622 struct completion ls_recovery_done; 623 int ls_recovery_result; 624 625 struct miscdevice ls_device; 626 627 struct workqueue_struct *ls_callback_wq; 628 629 /* recovery related */ 630 631 spinlock_t ls_cb_lock; 632 struct list_head ls_cb_delay; /* save for queue_work later */ 633 struct timer_list ls_timer; 634 struct task_struct *ls_recoverd_task; 635 struct mutex ls_recoverd_active; 636 spinlock_t ls_recover_lock; 637 unsigned long ls_recover_begin; /* jiffies timestamp */ 638 uint32_t ls_recover_status; /* DLM_RS_ */ 639 uint64_t ls_recover_seq; 640 struct dlm_recover *ls_recover_args; 641 struct rw_semaphore ls_in_recovery; /* block local requests */ 642 struct rw_semaphore ls_recv_active; /* block dlm_recv */ 643 struct list_head ls_requestqueue;/* queue remote requests */ 644 atomic_t ls_requestqueue_cnt; 645 wait_queue_head_t ls_requestqueue_wait; 646 struct mutex ls_requestqueue_mutex; 647 struct dlm_rcom *ls_recover_buf; 648 int ls_recover_nodeid; /* for debugging */ 649 unsigned int ls_recover_dir_sent_res; /* for log info */ 650 unsigned int ls_recover_dir_sent_msg; /* for log info */ 651 unsigned int ls_recover_locks_in; /* for log info */ 652 uint64_t ls_rcom_seq; 653 spinlock_t ls_rcom_spin; 654 struct list_head ls_recover_list; 655 spinlock_t ls_recover_list_lock; 656 int ls_recover_list_count; 657 struct idr ls_recover_idr; 658 spinlock_t ls_recover_idr_lock; 659 wait_queue_head_t ls_wait_general; 660 wait_queue_head_t ls_recover_lock_wait; 661 spinlock_t ls_clear_proc_locks; 662 663 struct list_head ls_root_list; /* root resources */ 664 struct rw_semaphore ls_root_sem; /* protect root_list */ 665 666 const struct dlm_lockspace_ops *ls_ops; 667 void *ls_ops_arg; 668 669 int ls_namelen; 670 char ls_name[DLM_LOCKSPACE_LEN + 1]; 671 }; 672 673 /* 674 * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines 675 * that they should abort what they're doing so new recovery can be started. 676 * 677 * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it 678 * should do down_write() on the in_recovery rw_semaphore. (doing down_write 679 * within dlm_ls_stop causes complaints about the lock acquired/released 680 * in different contexts.) 681 * 682 * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. 683 * It sets this after it is done with down_write() on the in_recovery 684 * rw_semaphore and clears it after it has released the rw_semaphore. 685 * 686 * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it 687 * should begin recovery of the lockspace. 688 * 689 * LSFL_RUNNING - set when normal locking activity is enabled. 690 * dlm_ls_stop() clears this to tell dlm locking routines that they should 691 * quit what they are doing so recovery can run. dlm_recoverd sets 692 * this after recovery is finished. 693 */ 694 695 #define LSFL_RECOVER_STOP 0 696 #define LSFL_RECOVER_DOWN 1 697 #define LSFL_RECOVER_LOCK 2 698 #define LSFL_RECOVER_WORK 3 699 #define LSFL_RUNNING 4 700 701 #define LSFL_RCOM_READY 5 702 #define LSFL_RCOM_WAIT 6 703 #define LSFL_UEVENT_WAIT 7 704 #ifdef CONFIG_DLM_DEPRECATED_API 705 #define LSFL_TIMEWARN 8 706 #endif 707 #define LSFL_CB_DELAY 9 708 #define LSFL_NODIR 10 709 710 /* much of this is just saving user space pointers associated with the 711 lock that we pass back to the user lib with an ast */ 712 713 struct dlm_user_args { 714 struct dlm_user_proc *proc; /* each process that opens the lockspace 715 device has private data 716 (dlm_user_proc) on the struct file, 717 the process's locks point back to it*/ 718 struct dlm_lksb lksb; 719 struct dlm_lksb __user *user_lksb; 720 void __user *castparam; 721 void __user *castaddr; 722 void __user *bastparam; 723 void __user *bastaddr; 724 uint64_t xid; 725 }; 726 727 #define DLM_PROC_FLAGS_CLOSING 1 728 #define DLM_PROC_FLAGS_COMPAT 2 729 730 /* locks list is kept so we can remove all a process's locks when it 731 exits (or orphan those that are persistent) */ 732 733 struct dlm_user_proc { 734 dlm_lockspace_t *lockspace; 735 unsigned long flags; /* DLM_PROC_FLAGS */ 736 struct list_head asts; 737 spinlock_t asts_spin; 738 struct list_head locks; 739 spinlock_t locks_spin; 740 struct list_head unlocking; 741 wait_queue_head_t wait; 742 }; 743 744 static inline int dlm_locking_stopped(struct dlm_ls *ls) 745 { 746 return !test_bit(LSFL_RUNNING, &ls->ls_flags); 747 } 748 749 static inline int dlm_recovery_stopped(struct dlm_ls *ls) 750 { 751 return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); 752 } 753 754 static inline int dlm_no_directory(struct dlm_ls *ls) 755 { 756 return test_bit(LSFL_NODIR, &ls->ls_flags); 757 } 758 759 #ifdef CONFIG_DLM_DEPRECATED_API 760 int dlm_netlink_init(void); 761 void dlm_netlink_exit(void); 762 void dlm_timeout_warn(struct dlm_lkb *lkb); 763 #else 764 static inline int dlm_netlink_init(void) { return 0; } 765 static inline void dlm_netlink_exit(void) { }; 766 static inline void dlm_timeout_warn(struct dlm_lkb *lkb) { }; 767 #endif 768 int dlm_plock_init(void); 769 void dlm_plock_exit(void); 770 771 #ifdef CONFIG_DLM_DEBUG 772 void dlm_register_debugfs(void); 773 void dlm_unregister_debugfs(void); 774 void dlm_create_debug_file(struct dlm_ls *ls); 775 void dlm_delete_debug_file(struct dlm_ls *ls); 776 void *dlm_create_debug_comms_file(int nodeid, void *data); 777 void dlm_delete_debug_comms_file(void *ctx); 778 #else 779 static inline void dlm_register_debugfs(void) { } 780 static inline void dlm_unregister_debugfs(void) { } 781 static inline void dlm_create_debug_file(struct dlm_ls *ls) { } 782 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } 783 static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; } 784 static inline void dlm_delete_debug_comms_file(void *ctx) { } 785 #endif 786 787 #endif /* __DLM_INTERNAL_DOT_H__ */ 788 789